21 VUL - A new luminous long period Delta Scuti star

Details 21 VUL - A new luminous long period Delta Scuti star 21 VUL - A new luminous long period Delta Scuti star

Nov 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979a%26a....79..347g&link_type=abstract

Astronomy and Astrophysics, vol. 79, no. 3, Nov. 1979, p. 347-349.

Astronomy and Astrophysics

Astrophysics

1

Metallic Stars, Stellar Spectra, Stellar Spectrophotometry, Variable Stars, Cepheid Variables, Hertzsprung-Russell Diagram, Light Curve, Stellar Luminosity

Scientific paper

Photometric observations of 21 Vul have revealed it to be a Delta Scuti variable star with one of the longest known periods, 0.227 d, among those variables. 21 Vul presented a short period amplitude variability of about 0.05 mag, and the log of its effective temperature was calculated to be 3.891. Moreover, its luminosity (absolute visual magnitude is higher than Mv = 0) suggests a luminosity class brighter than IV, and places it in the instability strip very close to the faintest Cepheids.

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